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Asteroid 7 Iris

Available Resources

Asteroid 7 Iris Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 7 Iris is now with respect to the brightest stars and constellations. More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 7 Iris in Pisces on April, 27 2017
High Precision Live Sky Chart
23h 01m 35s
-01° 48’ 12”
10.35
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Asteroid 7 Iris Rise and Set Times

Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 91.8°
Max altitude: 36.7°
Azimuth: 268.2°

Asteroid 7 Iris Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Asteroid 7 Iris Ephemeris

The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 Apr 20 10.39 22h 48m 56s -03° 16’ 46” Aquarius
2017 Apr 21 10.39 22h 50m 45s -03° 04’ 13” Aquarius
2017 Apr 22 10.38 22h 52m 35s -02° 51’ 38” Pisces
2017 Apr 23 10.38 22h 54m 23s -02° 38’ 59” Pisces
2017 Apr 24 10.37 22h 56m 11s -02° 26’ 21” Pisces
2017 Apr 25 10.36 22h 57m 59s -02° 13’ 40” Pisces
2017 Apr 26 10.36 22h 59m 48s -02° 00’ 56” Pisces
2017 Apr 27 10.35 23h 01m 35s -01° 48’ 12” Pisces
2017 Apr 28 10.35 23h 03m 23s -01° 35’ 26” Pisces
2017 Apr 29 10.34 23h 05m 11s -01° 22’ 38” Pisces
2017 Apr 30 10.33 23h 06m 59s -01° 09’ 51” Pisces
2017 May 01 10.33 23h 08m 45s -00° 57’ 00” Pisces
2017 May 02 10.32 23h 10m 32s -00° 44’ 08” Pisces
2017 May 03 10.31 23h 12m 20s -00° 31’ 15” Pisces

Distance of Asteroid 7 Iris from Earth

The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval. The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 7 Iris from Earth between January 2013 and January 2030

Light Curve of Asteroid 7 Iris

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 7 Iris between January 2013 and January 2030

Asteroid 7 Iris Physical Data

The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 199.83 km 0.0157
Sideral Rotation 7.1390 hours 0.2983
Absolute Magnitude 5.51
Geometric Albedo 0.2766

Asteroid 7 Iris Orbital Elements

The following table lists the orbital elements of Asteroid 7 Iris at epoch 30 July 2016 00:00 UTC (JD: 2457600.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.23139413
Orbit inclination i 5.52358048°
Perihelion distance q 1.83330159 AU
274,258,015 km
Aphelion distance Q 2.93715792 AU
439,392,572 km
Semi-major axis a 2.38522976 AU
356,825,293 km
Orbital period period 3.6800 years
1,345.5311 days
Date of perihelion transit Tp 2017-Nov-18 11:19:05
2,458,075.9716 JD
Argument of perihelion peri 145.36356528065°
Longitude of the ascending node node 259.57036980389°
Mean anomaly M 232.78646573329°
Mean motion n 0.26755234°/day
Closest approach to Earth* 2017-Oct-31
Distance of closest approach* 0.84895483 AU
127,001,834 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2030-Jan-01, with a sampling interval of 1 day.